During the registration process, if you chose to be anonymous (i.e. tick/check the anonymous option), then it doesn't seem to require your email address, so perhaps it will be possible to watch the event anonymously without registration. Unless it's a bug.

I've received an email from them, and it seems that it is necessary to pre-register in order to watch the proceedings.
The option to register anonymously should not actually be there purely for watching the proceeding; its an error in their system.
The 'anonymous' option should only be there for submitting evidence.

To clarify, for watching only, do not select the 'anonymous' option in order to register or it won't register you.
That's my understanding anyway.

Nancy Lee has provided an update regarding tomorrow's meeting, including important changes to public comment:

Because of a snow storm in the Washington DC area, the Federal Office of Personnel Management has closed all federal govt. offices in DC. This includes the tech support we need for webinars.

Unfortunately, we cannot have the webinar today. Additionally, we cannot get the CFSAC website updated today.

We will have the webinar tomorrow (Wed. Dec. 11) beginning at noon ET, IF govt. offices are open. Dr Gailen Marshall, the CFSAC Chair, will work with the committee members at the beginning of the webinar to modify the agenda to accommodate the compressed timeframe.

We will have public comment tomorrow for those who were scheduled to speak on Wed. Unfortunately, we won’t be able to accommodate the public comments that were scheduled for Tuesday because we cannot confirm with the speakers that they are available for the Wednesday time slot.

So that we have more time for the Committee to deliberate and discuss, we ask those providing public comment tomorrow to limit their speaking time to 3 minutes.

If we must cancel the webinar tomorrow (DC doesn’t handle snowy, icy roads well), we will reschedule the CFSAC meeting webinar to occur after the first of the year.

I understand that due to weather issues in D.C. today, HHS was closed which forced you to cancel today's webinar meeting. I am very concerned though with the fact that you are trying to shrink two days into one.

It was bad enough that we did not have the availability of a live meeting as we usually do. Then, the agenda was shrunk from two full days to two half day.

Now all we are left with is one half a day webinar meeting.

For a group of patients who already feel ignored and marginalized, this does not give a feeling of confidence that HHS is concerned about us. Especially at this most important juncture of HHS contracting with the IOM to redefine ME/CFS and all the unanswered questions regarding this action, I feel that this is a great mistake.

I urge you to reschedule a full two day meeting with appropriate time for deliberation about important issues effecting ME/CFS patients.